allow choosing ctxtPrimes of less than NTL_SP_NBITS
allow choosing ctxtPrimes of less than NTL_SP_NBITS

AlexanderViand/HElib,AlexanderViand/HElib,AlexanderViand/HElib,berserkr/HElib,shaih/HElib,shaih/HElib,berserkr/HElib,berserkr/HElib,shaih/HElib